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INDONESIA
Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111934     EISSN : 24429147     DOI : -
Core Subject : Education, Agriculture,
Agriculture, Biological Sciences & Forestry Mathematics Other
Merupakan media informasi dan komunikasi para praktisi, peneliti, dan akademisi yang berkecimpung dan menaruh minat serta perhatian pada pengembangan Matematika, ilmu pengetahuan dan teknologi. Diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Terbuka.
Arjuna Subject : -
Articles 403 Documents
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Pengaruh Kadmium terhadap Gangguan Patologik pada Ginjal Tikus Percobaan Ratnaningsih, Anna
Jurnal Matematika Sains dan Teknologi Vol 5 No 1 (2004)
Publisher : LPPM Universitas Terbuka

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Abstract

Once of environmental pollution is heavy metal cadmium that causes toxic effect to the human and animal life. This research is to identify the effect of cadmium on kidney function. Cadmium was administered by adding it in drinking water. This study was performed by using four cadmium’s concentrations on drinking water which are 0 mg/L (control); 0.06 mg/L; 6.60 mg/L and 66.00 mg/L. Observation was conducted during 0 week; 2 week; 4 week; 6 week and 8 week. The failure of kidney function is indicated by accumulation of cadmium on the kidney and protein contens in the urin of Wistar rats. The result showed that the exposure of cadmium through drinking water caused pathophysiology effect in rats such as increasing of proteinuria and accumulation of cadmium in kidney. Pathological effect such as cell degeneration of kidney was also observed.
MODEL OPTIMASI PEMETAAN MATA KULIAH BERPRASYARAT UNTUK RENCANA STUDI MAHASISWA (STUDI KASUS PROGRAM STUDI MATEMATIKA FMIPA UT) Tarigan, Asmara Iriani; Farihati, Sitta Alief
Jurnal Matematika Sains dan Teknologi Vol 14 No 2 (2013)
Publisher : LPPM Universitas Terbuka

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Abstract

Universitas Terbuka (UT) sebagai perguruan tinggi yang menerapkan sistem belajar jarak jauh menyusun kurikulum program pendidikannya berbeda dengan perguruan tinggi yang mempunyai sistem belajar tatap muka. Mahasiswa UT diberikan kebebasan dalam memilih dan menentukan mata kuliah untuk diregistrasikan pada satu semester. Dalam kurikulum program studi di UT terlihat bahwa terdapat mata kuliah yang mempunyai hubungan keterkaitan materi antarmata kuliah. Hubungan tersebut digambarkan sebagai hubungan prasyarat antarmata kuliah. Untuk membuat rencana studi, mahasiswa perlu mengetahui hubungan keterkaitan materi antarmata kuliah tersebut sehingga dapat menentukan mata kuliah yang akan diregistrasi pada suatu semester. Artikel ini mengidentifikasi keterkaitan materi antarmata kuliah untuk dipetakan dalam rencana studi. Untuk memetakan mata kuliah berprasyarat tersebut perlu dilakukan optimasi pemetaan mata kuliah. Tujuan pengembangan model optimasi ini adalah untuk memaksimalkan hubungan keterkaitan materi dengan memetakan mata kuliah berprasyarat secara berurutan. Hal ini juga berarti meminimalkan jarak antarsemester urutan mata kuliah berprasyarat. Model optimasi yang dikembangkan berupa Integer Linear Programming. Model tersebut kemudian diimplementasikan pada kurikulum Program Studi Matematika FMIPA UT. Hasil simulasinya berupa rencana studi bagi mahasiswa Program Studi tersebut. Dari analisis hasil simulasi diperoleh rencana studi dengan jumlah maksimal 21 dan 23 SKS per semester merupakan pilihan terbaik bagi mahasiswa.   Universitas Terbuka (UT) as an open and distance learning institution has curriculum that different from face to face universities. UTs students can take any course since UT offers all courses in any semester. Some courses are prerequisite for some other courses. Students need to be careful in taking the courses because some courses also have same schedule in examination. Besides, they also need to consider the courses that have prerequisite. This article identifies the relationship between some courses that need to be considered by the students when they register the courses. A map of courses was developed by using Integer Linear Programming. This map was intended to maximize the information of interrelationship between courses in rows. The distance between prerequisite courses was minimized for some semesters. This model was implemented on Mathematics study program at Faculty of Mathematics and Science in UT. The result of simulation was a study planning for Mathematics students in taking courses in every semester. The optimal number of credits semester that need to be registered was 21 or 23 credits.
ANALISIS KANDUNGAN BORAKS PADA MAKANAN: STUDI KASUS DI WILAYAH KECAMATAN PAMULANG, TANGERANG SELATAN Rumanta, Maman; Iryani, Krisna; Ratnaningsih, Anna
Jurnal Matematika Sains dan Teknologi Vol 17 No 1 (2016)
Publisher : LPPM Universitas Terbuka

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Abstract

This study aimed to analyze borax content in food and the effects of food processing on the content of borax in food. This research adopted a survey method. Food samples were obtained from the traditional and modern markets, elementary schools, and supermarkets available in the region of Pamulang Subdistrict. Sampling was done by using a purposive technique. Each sample was qualitatively analyzed for its borax content using a borax test kit. The detected food was then analyzed by using a qualitative analysis (i.e., there are four categories of data); one sample per category was taken to be analyzed quantitatively using the HPLC method in the Laboratorium of Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. The treatment of food containing the highest level of borax) was conducted by boiling them during a certain period of time (i.e., 5 minutes, 15 minutes, and 30 minutes) and then frying them until well cooked (was not burnt). The collected data were then analyzed descriptively. The results showed that 54% of the samples obtained from the Elementary Schools positively contained borax; as much as 74% of the food samples obtained from traditional markets contained borax positively; while all samples coming from the supermarkets did not contain borax. The content of borax in the detected food in this research ranged between 560 mg/kg up to 17,640 mg/kg. The highest content of borax found in yellow wet noodles (17,640 mg/kg) was far above the maximum level specified by EFSA (2013), that is as much as 4,000 mg/kg. The boiling process was quite effective in lowering the level of borax in food, while the frying process did not actually reduce the level of borax in food. Penelitian ini bertujuan untuk menganalisis kandungan boraks pada makanan dan pengaruh pengolahan makanan terhadap kandungan boraks pada makanan. Penelitian ini dilakukan dengan metode survei. Jenis makanan yang dijadikan sampel dalam penelitian ini adalah jenis makanan yang diperoleh dari pasar tradisional dan modern, sekolah dasar, dan supermarket di wilayah Kecamatan Pamulang. Pengambilan sampel dilakukan dengan menggunakan teknik purposive sampling. Setiap sampel dianalisis kandungan boraksnya secara kualitatif menggunakan test kit boraks. Selanjutnya, makanan yang telah terdeteksi oleh analisis kualitatif (ada empat kategori data), diambil satu sampel per kategori untuk dianalisis secara kuantitatif menggunakan metode HPLC di Laboratorium Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. Makanan yang terdeteksi mengandung boraks paling tinggi diperlakukan dengan cara direbus dalam beberapa rentang waktu (5 menit, 15 menit, dan 30 menit) dan digoreng sampai matang (tidak sampai gosong). Data yang dikumpulkan dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa 54% dari sampel makanan yang diperoleh dari Sekolah Dasar positif mengandung boraks; sebanyak 74% dari sampel makanan yang diperoleh dari pasar tradisional positif mengandung boraks; sementara semua sampel berasal dari supermarket tidak terdeteksi mengandung boraks. Kandungan boraks dalam makanan yang terdeteksi dalam penelitian ini berkisar antara 560 mg/kg sampai dengan 17.640 mg/kg. Kandungan tertinggi ditemukan dalam mie basah kuning (17.640 mg/kg) jauh di atas kadar maksimum yang ditentukan EFSA (2013) sebanyak 4.000 mg/kg. Proses perebusan cukup efektif dalam menurunkan kadar boraks dalam makanan, sedangkan proses penggorengan tidak mengurangi kadar boraks dalam makanan.
KONTRIBUSI INDUSTRI PENGOLAHAN HASIL PERIKANAN TRADISIONAL TERHADAP PENDAPATAN NELAYAN PENGOLAH Yuliana, Ernik; Indrawati, Endang; Farida, Idha
Jurnal Matematika Sains dan Teknologi Vol 8 No 1 (2007)
Publisher : LPPM Universitas Terbuka

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Abstract

Traditional fish processing industries in Muara Angke Jakarta have been involving many labor from the local fishermen or others. This study describes the contributions of many small industry to the labor incomes based on every small industry profit distribution. Survey method had been applied to collect the data. The population are all small traditional fish processing industries in Muara Angke. The samples are chosen based on their product, either salty fish or smoked fish. “Hayami method” was applied to calculate the added value of each small industry. The results of this study shows that salty squid has the highest value added (Rp2167,61/kg) and highest profits (Rp2072,61/kg), Indian mackerel smoked fish gives the highest contributions to labor incomes (Rp663,36/kg). Sardinella salty fish gives the highest profit level, followed by salty squid and salty mackerel scad. Salty stingray and salty Indian mackerel gives high value for labor return. In addition, salty sardinella, salty squid, and salty “lesi” fish have high added value ratio. Salty stingray gives the highest other input contribution, followed by smoked Indian mackerel.
ISOLASI MIKROBA YANG DAPAT MENGHILANGKAN BAU PADA PUPUK ORGANIK AIR LIMBAH CUCIAN BERAS ., Elfarisna; Puspitasari, Rita Tri; Suryati, Yati; Pradana, Nosa T.
Jurnal Matematika Sains dan Teknologi Vol 15 No 2 (2014)
Publisher : LPPM Universitas Terbuka

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Abstract

Air limbah cucian beras jika difermentasi selama dua minggu menimbulkan bau. Penelitian yang dilakukan dengan menambah Efektif Microorganisme (EM 4) dapat memperpendek waktu fermentasi dan tidak menimbulkan bau. Efektif Microorganisme 4 adalah produk dari luar, sementara Indonesia mempunyai banyak mikroorganisme lokal yang potensial untuk dikembangkan. Pupuk organik ini telah diteliti pada tanaman anggrek, sayur-sayuran, dan kedelai. Tujuan penelitian untuk mendapatkan mikroorganisme lokal yang dapat menghilangkan bau pada air limbah cucian beras yang akan digunakan sebagai pupuk organik. Isolasi dengan menggunakan media Patato Dextrose Agar (PDA) dan Mann Rogosa Sharpe Agar (MRSA), dengan sumber inokulan air limbah cucian beras, ragi tape, kombucha, dan yoghurt. Hasil isolasi diperoleh 2 jenis Lactobacillus dari air limbah cucian beras dan yogurt. Ada tujuh khamir yang diperoleh, yaitu dari air limbah cucian beras (4 jenis), ragi tape (2 jenis), dan kombucha (1 jenis). Dari hasil penelitian ini dipilih 1 jenis Lactobacillus, dan 4 jenis khamir yang dapat hidup dengan baik di dalam air limbah cucian beras dan tidak menimbulkan bau.
STATUS HARA MAKRO TANAH YANG DITUMBUHI POPULASI BINTANGUR (Calophyllum spp.) (Studi Kasus di Hutan Lindung Sei Tembesi dan Bukit Tiban, Batam) Yuliastrin, Adisti
Jurnal Matematika Sains dan Teknologi Vol 17 No 2 (2016)
Publisher : LPPM Universitas Terbuka

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This research was conducted by the problem of population differences bintangur in Sei Tembesi and Bukit Tiban Protected Forest allegedly influenced by macro nutrient content in the soil. The study was conducted using a survey method. Samples were taken by purposive by following along a 100 m transect lines that divide the contour lines. Transect were initiated at least 50 m from the edge of the forest that are placed propossionally and prioritized on location around bintangur population. Soil sampling conducted on the soil surface of ± 5 cm to a depth of ± 25 cm from the soil surface. Based on the research that there are differences in soil organic matter content in the protected forest and macro nutrient in the soil. Soil pH is at the same relativity value, but that value is an extreme value when compared with the value according to criteria of Soil Chemical Properties. This soil conditions is able to inhibit the growth of bintangur. Bintangur population in both of the protected forest can be maintained through soil conservation biological. Penelitian ini dilatarbelakangi oleh permasalahan perbedaan populasi bintangur di Hutan Lindung Sei Tembesi dan Bukit Tiban yang diduga dipengaruhi oleh kandungan hara makro di dalam tanah. Penelitian dilakukan menggunakan metode survei. Sampel diambil dengan cara purposive dengan mengikuti jalur transek sepanjang 100 m yang membelah garis kontur. Jalur transek tersebut dimulai minimal 50 m dari tepi hutan yang ditempatkan secara proporsional dan diprioritaskan pada lokasi sekitar populasi bintangur. Pengambilan sampel tanah dilakukan pada permukaan tanah ± 5 cm pada kedalaman ± 25 cm dari permukaan tanah. Berdasarkan hasil penelitian diperoleh informasi bahwa terdapat perbedaan kandungan bahan organik tanah di kedua hutan lindung tersebut dan kandungan hara makro di dalam tanah. pH tanah berada pada nilai yang relatif sama, namun nilai tersebut merupakan nilai yang ekstrim bila dibandingkan dengan Kriteria Penilaian Sifat Kimia Tanah. Kondisi tanah seperti itu mampu menghambat pertumbuhan bintangur. Populasi bintangur di kedua hutan lindung tersebut dapat dipertahankan melalui konservasi tanah secara biologi.
SUBSTITUSI TEPUNG DAUN MENGKUDU DALAM RANSUM MENINGKATKAN KINERJA AYAM BROILER Tuty Maria Wardiny; T Eduard Azwar Sinar; Desmayati Zainuddin
Jurnal Matematika Sains dan Teknologi Vol. 12 No. 2 (2011)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jmst.v12i2.516.2011

Abstract

An experiment was conduted to evaluate the effectiveness level of corn substituted by Morinda citrifolia leaf meal in broiler ration. The use of Morinda citrifolia leaf meal substituted for corn in ration is expected to improve feed conversion in broiler chickens and produce chicken meat that safe for consumption and free of chemical antibiotics residues . Completely Randomized Design (CRD) was used to analyze data obtained from this research. One hundred and sixty chicleas (7 days aged) divided into 5 (five) treatments with 4 (four) replications and each replication consisted of 8 (eight) chicleas. Ration of treatments were a negative control diet (R0), 1% Morinda citrifolia leaf meal (R1), 2% Morinda citrifolia leaf meal (R2), 3% Morinda citrifolia leaf meal (R3) and commersial ration (R4). All treatments rations were added a natural feed additive that consist of 0,125% Curcuma and.0,075% Turmeric meal. Measured parameters were feed intake, weight gain, feed conversion ratio, mortality, percentages of carcas and abdominal fat. Results showed that feed consumption, weight gain, and feed conversion ratio were significantly (p <0.05) influenced by treatments. Mortality, percentage of carcas and abdominal fat were not significantly (p >0.05) influenced by ration treatments. Mortality rates in chickens using a ration of treatment was 0%, while using the control diet 0,78% (1 bird). The counclusion showed that the substitution of 1-2% Morinda citrifolia leaf meal in ration has better performance compared to the control diet, with improvement of feed conversion ratio was 7.57 and 9.2% respectively was more efficient than the control diets
ANALISIS KEBERLANJUTAN USAHATANI HORTIKULTURA SAYURAN PADA LAHAN BERLERENG DI HULU DAS JENEBERANG, SULAWESI SELATAN Saida, Saida; Sabiham, S; Widiatmaka, Widiatmaka; Sutjahjo, S H
Jurnal Matematika Sains dan Teknologi Vol 12 No 2 (2011)
Publisher : LPPM Universitas Terbuka

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This study aimed to analyse the sustainability of vegetables horticultural farming on sloping land in the upstream Jeneberang watershed based on the index evaluation and the status of sustainability by Rap-farm method using Multidimensional Scaling (MDS).Results of ordination technique analysis Rap-farm method of MDS showed that index of vegetables horticultural farming sustainability ranged from 32.19-62.53. Dimension of ecological, economical, institutional, and technological included into sustainable enough category, while social dimension, included into less sustainable category in vegetables horticultural farming systems.Results of leverage Rap-farm analysis showed that from 43 attributes that were analyzed, there were 23 sensitive attributes that affected into the sustainability of vegetables horticultural farming systems in the upstream of Jeneberang watershed.
KOMPETENSI PENYULUH DALAM MENGAKSES INFORMASI PERTANIAN (KASUS ALUMNI UT DI WILAYAH SERANG) Huda, Nurul; Setijorini, Ludivica Endang
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

The objectives of this study were to describe the competence of the agriculture extension workers in terms of their access on agricultural information. By using an explanatory research design and a census method, all population of agricultural extention workers in Serang Regency, West Java were used as respondent. Data were collected by questionnaire and analyzed with descriptive and regression analysis. The results of this study indicated that generally no relation was found between factors on individual characteristics, learning activities at UT, other learning source, environment factors, and their competence on information access. It was found that their competence level was categorized as moderate. The same level was also on their competence aspects, those were cognitive, affective, and psychomotor. Related to their perfomance in innovation implementation, the findings indicated that the level was moderate. In conclusion, the competence of agriculture extension workers which was categorized as moderate need to to be improved in order to give a better service to farmer. &nbsp;
PENGELOMPOKKAN DAN KLASIFIKASI PENGGUNAAN KONTRASEPSI DI INDONESIA Gede Suwardika
Jurnal Matematika Sains dan Teknologi Vol. 17 No. 1 (2016)
Publisher : LPPM Universitas Terbuka

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The use of contraception is crucial, given the growth rate can decrease. The election to use or not to use contraceptives is one of the problems of classification. Classification problem can be solved by methods of binary Logistic Regression, Support Vector Machine (SVM), and CART (Classification and Regression Trees). However, due to the variable response will be made binary then the done method of grouping in advance with its own assumptions, the k-means cluster and cluster the kernel k-means. In this study data about the use of classification taken contraceptives that were affected by the 9 free variables. Such data is data the secondary National Contraceptive Prevalence Survey results Indonesia in 1987. The number of respondennya is 1.473 people. The end results were obtained grouping the results turned out to be assuming themselves better than other methods. While on the method of classification SVM classification that results obtained are better than the other two methods. However, if the method of grouping and classification are merged, acquired that classification with SVM where the variable response is obtained based on the k-means cluster groupings or clusters of the kernel k-means can make Apperant Error Rate (APER) the least. Penggunaan kontrasepsi merupakan hal yang penting, mengingat dapat menurunkan laju pertumbuhan. Pemilihan menggunakan atau tidak menggunakan alat kontrasepsi merupakan salah satu permasalahan klasifikasi. Permasalahan klasifikasi dapat diselesaikan salah satunya dengan metode Regresi logistik biner, Support Vector Machine (SVM), dan CART (Classification and Regression Trees). Namun dikarenakan variabel respon akan dijadikan biner maka dilakukan metode pengelompokan terlebih dahulu dengan asumsi sendiri, cluster k-means dan cluster kernel k-means.Dalam penelitian ini diambil data mengenai klasifikasi penggunaan kontrasepsi yang dipengaruhi oleh 9 variabel bebas. Data tersebut adalah data sekunder hasil Survey Prevalensi Kontrasepsi Nasional Indonesia tahun 1987. Jumlah respondennya adalah 1.473 orang. Hasil akhir yang diperoleh ternyata hasil pengelompokan dengan asumsi sendiri lebih baik dibandingkan metode yang lain. Sedangkan pada metode pengklasifikasian diperoleh bahwa hasil klasifikasi SVM lebih baik dibanding dua metode yang lain. Namun apabila metode pengelompokan dan klasifikasi digabung, diperoleh bahwa pengklasifikasian dengan SVM dimana variabel respon diperoleh berdasarkan hasil pengelompokan cluster k-means atau cluster kernel k-means dapat menghasilkan Apperant Error Rate (APER) yang paling kecil.

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